The structure of “It was early December 2003, my first season as a Salvation Army bell ringer, when I was confronted with the question. ” is
A.
The subject is “It” and the predicate part is an abstract concept. “my first season as a … ringer” is an appositive of “early December 2003”. “when I was confronted with the question” is an attributive clause of “early December 2003”.
B.
The subject is “It” and the predicate part is “is”. “my first season as a… ringer” is an appositive of “early December 2003”. “when I was confronted with the question” is an attributive clause of “early December 2003”.
C.
The subject is “It” and the predicate part is an abstract concept. “my first season as a … ringer” is an appositive clause of “early December 2003”. “when I was confronted with the question” is an attributive clause of “early December 2003”.
D.
The subject is “It” and the predicate part is an abstract concept. “my first season as a … ringer” is an appositive of “early December 2003”. “when I was confronted with the question” is an adverbial clause of “early December 2003”.