Multiple choice

Directions: Choose the word or set of words for each blank that best fits the meaning of the sentence as a whole.

The notion that a parasite can alter the behavior of a host organism is not mere fiction; indeed, the phenomenon is not even _________.

  1. observable

  2. real

  3. comprehended

  4. rare

  5. imaginable

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Rare is the correct answer because the sentence is suggesting that changes in behavior is not uncommon, therefore if they are common, they are not rare.