In mid-summer, a family assembled a patio set for their deck. Most of the assembling was done by placing metal screws into plastic holes. The furniture was stable throughout the summer. However, when the weather turned cold in the late fall, the family noticed that the chairs and table became wobbly. Which statement best explains what happened?

a
Plastic has greater thermal expansion than metal does.
b
Both plastic and metal contract when warm and expand when cold.
c
The metal screws contracted less than the plastic did when they became cold.
d
The metal screws contracted and therefore the table and chairs became wobbly.