What is the effect of the bolded figurative language on the passage?

"No... I just remembered that today's my birthday."
I was thirty. **Before me stretched the portentous, menacing road of a new decade.**

A. The alliteration reveals that the speaker believes birthdays are repetitive.
The metaphor reflects the speaker's negative attitude toward growing older.
B. The personification of the birthday makes the reader realize the speaker's age.
C. The simile positively compares birthdays to a long and winding road.

D. The metaphor reflects the speaker's negative attitude toward growing older.