Romand Found That, in the Kitten

Romand found that, in the kitten:

A) Detection thresholds of neurons tuned to lower frequencies tend to reach adult levels sooner than do those of neurons tuned to medium and higher frequencies
B) Detection thresholds of neurons tuned to higher frequencies tend to reach adult levels sooner than do those of neurons tuned to medium and lower frequencies
C) There are no obvious differences in the rates of maturation of neurons tuned to different frequencies
D) Frequency tuning does not improve after 1 week