Regarding a Pygmy Chimpanzee (Or Bonobo) Named Kanzi's Language and Grammar

Multiple Choice

Regarding a pygmy chimpanzee (or bonobo) named Kanzi's language and grammar skills, which of the following statements is FALSE?

A) Kanzi's grammar is comparable to that of a two-year-old child.
B) Some of the lexigrams Kanzi know are quite abstract, like symbols for "bad" and "good."
C) Kanzi usually places action symbols in the order he wants to carry them out, such as "chase tickle" or "chase hide."
D) Kanzi cannot understand spoken sentences unless visually prompted by the trainers.