Which statement is an example of synecdoche?

In many ways, it was the best day of the bride’s life, but unexpected mishaps almost caused it to be the worst day of her life.
“Beautiful weather we’re having,” I grumbled as the sky suddenly darkened and thick raindrops soaked through my cotton shirt.
The suits upstairs, in their cushy executive offices, decided that the junior managers should be thrilled with their individual cubicles.
As beads of sweat trickled down our reddened faces and aching backs, the exhausted worker said, “Sure is hot today, isn’t it?”