Multiple choice

When we reflect upon the vast diversity of the plants and animals which have been cultivated, and have varied during all ages under the most different climates and treatments, I think we are driven to conclude that this greater variability is simply due to our domestic productions having been raised under conditions of life not so uniform as, and somewhat different from, those to which the parent-species have been exposed under nature.

  1. reflect upon the vast diversity of the plants and animals which have been cultivated, and have varied during all ages under the most different climates and treatments, I think we are driven to conclude that this greater variability is simply due to our domestic productions

  2. reflect on the vast diversity of plants and animals which have been cultivated, and have varied during all ages under the most different climates and treatment, I think we are driven to the conclusion that this greater variability is simply due to our domestic production

  3. reflect upon the vast diversity of plants and animals which have been cultivated, and which have varied during all ages under the most different climates and treatments, I think we are driven to the conclusion that this great variability is simply due to our domestic productions

  4. reflect on the vast diversity of the plants and animals which have been cultivated, and which have varied during all ages under the most different climates and treatment, I think we are driven to conclude that this greater variability is simply due to our domestic productions

  5. reflect on the vast diversity of the plants and animals which have been cultivated, and have varied during all ages under the most different climates and treatment, I think we are driven to conclude that this great variability is simply due to our domestic production
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

'Reflect upon' means to remember whereas 'reflect on' means to think about something seriously. Since 'have been' and 'have', two  different verb forms are used for 'cultivated' and 'varied' both expressions need to be preceded by 'which' separately. 'Treatment' is the grammatically correct expression based on the context of the sentence. 'driven to conclude' is the better expression as 'driven to the conclusion' requires an agent to do the driving part that has not been mentioned anywhere in the sentence. 'Greater' is preferable to 'great' as there is a direct comparison between two entities. 'productions' in the sentence refers to multiple products being produced over different periods of time so it is a better construct than 'production'.  Hence (4).

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