Select the correctly punctuated sentence.
ASchool began on a cold September morning.
BSchool began on a cold, September morning.
CSchool began on a cold September, morning.
DSchool began on a cold, September, morning.
ASchool began on a cold September morning.
BSchool began on a cold, September morning.
CSchool began on a cold September, morning.
DSchool began on a cold, September, morning.