Question

choose the one sentence from this part that shows that robert yerkes did not get the results he had hoped for. yerkes sent a chimp named gua to live in a human household alongside a toddler named donald kellogg. in this
everse tarzan\ experiment, gua and donald were supposed to grow up together. yerkes hoped gua would learn everything that donald learned, including how to talk. but gua never uttered a word.

Explanation:

The question asks for the sentence showing Yerkes failed to get his desired results. Yerkes hoped Gua would learn to talk like Donald; the sentence stating Gua never spoke directly contradicts this hope.

Answer:

But Gua never uttered a word.