Diary Studies Have Been Used in the Study of Children's

Diary studies have been used in the study of children's speech acquisition to:

A) provide normative data about when a population of children master the articulation of specific consonants.
B) offer insight into variable productions across a group of children at one point in time.
C) provide detailed speech samples and analyses for generating and testing theories about speech acquisition.
D) provide information about the mean, standard deviation, and average age of consonant acquisition.