Research on the Use of Various Meanings That Children Convey

Research on the use of various meanings that children convey with earliest sentences (such as agent-action, action-location, and recurrence) has shown that

A) all children express all the meanings in their earliest sentences.
B) there is a fixed order in which the meanings are acquired.
C) all children appear to express at least a few meanings in their earliest speech.
D) most of the meanings are too difficult for children under five years of age.
E) the meanings first appear in holophrastic speech.