Marie Devers

She explained that she had been the photographer of her high-school yearbook. She pulled out the old crimson book and opened it up to a giant photograph that took up a whole page. A small group of kids crowded into the shot. I looked away from the photograph and up at my grandmother’s sentimental smile.
In paragraph 2 the word sentimental means

A) attractive.
B) gloomy.
C) heartfelt.
D) important.