Rosalie and Tom are creating patterns.

Rosalie uses the rule “add 4” and starts at 3.
Tom uses the rule “add 8” and starts at 7.

Which best compares Rosalie's and Tom's patterns?

A. Tom's number is always equal to Rosalie's number plus 4.

B. Tom's number is always twice as large as Rosalie's number.

C. Tom's number minus Rosalie's number is always divisible by 4.

D. Tom's number is always 3/2 times larger than Rosalie's number.