Question ID:PT52 S3 Q7 Passage:Gotera:  Infants lack the motor ability required to voluntarily produce particular sounds, but produce various babbling sounds randomly. Most children are several years old before they can voluntarily produce most of the vowel and consonant sounds of their language. We can conclude that speech acquisition is entirely a motor control process rather than a process that is abstract or mental.  Stem:Which one of the following is an assumption required by Gotera's argument? Correct Answer Choice:AChoice A:Speech acquisition is a function only of one's ability to produce the sounds of spoken language. Choice B:During the entire initial babbling stage, infants cannot intentionally move their tongues while they are babbling. Choice C:The initial babbling stage is completed during infancy. Choice D:The initial babbling stage is the first stage of the speech acquisition process. Choice E:Control of tongue and mouth movements requires a sophisticated level of mental development.