According to experts, some dogs have linguistic capacities comparable to those of language-trained apes and dolphins, even approaching the abilities of three-year-old children. Rico, a border collie from Germany, provides an especially striking example. Researchers asked Rico to retrieve a specific object—one he had never before encountered—from a room with several other familiar items. Rico was able to fetch the new object seven out of ten times. This suggests that Rico was able to reason that the new name could not refer to any of the familiar objects and must therefore refer to the new object. Four weeks later, he still remembered about half of the new vocabulary. Do It! Rico _________ the new vocabulary. Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected A portrayed B comprehended C dictated D enriched
Based on the given information, the most appropriate word to fill in the blank would be "comprehended". This is because Rico, the border collie, was able to understand and remember the new vocabulary given to him by the researchers.
