How many lines are determined by two points?
A. 2
B. infinite
C. 1
D. 0

The answer is C: 1

Since we have given two points.
And we know the definition of line which states that " A line is formed by two points and it can be extended from both the sides."

So, From two points, there must be 1 line .
Hence, one line is determined by two points.

Hope this helps