Please check:

Which of the following vary in size

1. pencils in a package
2. tennis balls in a can
c. shoes in a shoe store
d. eggs in an egg carton

D?

No.

Look up the word "vary" in a dictionary.

Dictionary.com

oh c?

Right. :-)

To determine which of the options vary in size, we need to understand what each option represents and consider whether the individual items within that option can have different sizes.

1. Pencils in a package: Pencils typically come in standardized sizes, so the pencils in a package are likely to be the same size. Therefore, they do not vary in size.

2. Tennis balls in a can: Tennis balls can sometimes vary in size due to manufacturing differences. So, the tennis balls in a can can potentially vary in size.

c. Shoes in a shoe store: Shoes come in a range of sizes to fit different foot sizes. So, the shoes in a shoe store definitely vary in size.

d. Eggs in an egg carton: Eggs typically come in a standard size, so the eggs in an egg carton are likely to be the same size. Therefore, they do not vary in size.

From the given options, the shoes in a shoe store are the only ones that vary in size.