Question

each year in the middle of february, when slush is underfoot and the sky is a depressing gray, i begin dreaming of warm beaches, tropical fruits and sunsets. if only i could save enough for a winter vacation! maybe next year ill win the lottery. meanwhile, ill read travel brochures and sigh.
unsure
joyous
longing
frustrated

Explanation:

The narrator dreams of a winter vacation, reads travel brochures and sighs, showing a strong desire. The words "If only" also indicate longing.

Answer:

C. longing