HELP QUICK PLSS The shadow of the tree is 40 feet long. A yard-stick placed next to the tree casts a 6 foot shadow. How tall is the tree?

Sequence A. Common difference:
7-5=9-7=11-9=2

Sequence B. Common difference:
43-34=52-43=61-52=9

Sequence C. Common difference:
-4-(-9)=1-(-4)=6-1
-4+9=1+4=5
5=5=5

From least common difference to greatest common difference:
2, 5, 9
A, C, B

Second option A, C, B