Multiple choice

Scientists have found that mole rats, having been exposed to high levels of cancer causing gamma radiation, and thus having lowered immunity levels, nevertheless produce antibodies at similar levels, and as readily as unexposed mole rats do.

  1. thus having lowered immunity levels, nevertheless produce antibodies at similar levels, and as readily as unexposed mole rats do

  2. having thus lowered immunity levels, should produce similar levels of antibodies as, and as readily as unexposed mole rats do

  3. thus never have similar immunity levels to unexposed mole rats, still produce similar levels of antibodies as them and equally readily too

  4. thus having lowered immunity levels, nevertheless produce similar levels of antibodies, and as readily that unexposed mole rats do

  5. thereby have lowered immunity levels, nonetheless manage to produce similar antibodies, and just as readily as unexposed mole rats do

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A Correct answer
Explanation

Correct. The sentence contains no error.