Jamillah took her dog, Tyson, to the vet. Last year, the
difference in his weight from the previous year was -2.1 pounds. This year, the difference in his weight
from last year was 3.4 pounds. What is the difference in Tyson's weight from 2 years ago?
A: 5.5 pounds
B: 1.3 pounds
C: -5.5 pounds
D: -1.3 pounds
Plss I need the answer fast!!