Smaller than poppy seeds, tardigrades are tiny, but they are tough. These minuscule animals can survive for thirty years
without food or water, and ______ can withstand extreme temperatures as low as minus 328 degrees and as high as 304
degrees Fahrenheit.
that
it
they
he
Choice C is the best answer. The convention being tested is pronoun-antecedent agreement. The plural pronoun "they"
agrees in number with the plural antecedent "animals," which refers to tardigrades.
Choice A is incorrect because the singular pronoun "that" doesn’t agree in number with the plural antecedent "animals."
Choice B is incorrect because the singular pronoun "it" doesn’t agree in number with the plural antecedent "animals." Choice
D is incorrect because the singular pronoun "he" doesn’t agree in number with the plural antecedent "animals."