True, though the opinion is wrong, being directly opposed by the fact that each year has 12 months on the western calendar.
It means to understand how sweet success "tastes", you have to have a need or real desire to succeed.
D.
The two parts are independent of each other, which dictates the use of a semicolon. "Traffic was heavy." and "We were late."
"Consequently" is a transition between the two, and requires a comma.
