The term "curriculum" can mean an

academic area of study or:

1. a federal guideline
2. a holistic subject
3. the total program
4. a separate model

Can't "curriculum" mean the total
program?

Generally, it means an integrated program of study. That can be total program.

I know to some,curriculum means the total program,such as an infant,toddler,
pre-school,Montessori,Head Start, or
kindergarten program.
But a second way to look at curriculum
is to view it as a separate subject,
content, or academic area of study.
With that said should the correct answer
be (3)the total program or
(4)a separate model