Answer:
A. Circumference(air) = 1
Explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.
The circumference of a balloon (which depends on the amount of air inside)
is 1 meter.
A. Circumference(air) = 1
B. Circumference(air) < 1
C. Circumference(1) > 0
D. Air(circumference) = 1
My answer:
A. Circumference(air) = 1
Because The circumference is the dependent variable in this case where the amount of air inside is the independent one. The more the amount of air inside is, the more the the circumference is. Like f(x).
is 1 meter equals to "= 1 "