A plus is + and a equal is = don’t really understand what your asking so
The answer for the picture put up is D, not C.
D is the correct answer.
It's more accurate, especially since heart rate is almost universally measures in beats-per-minute, than, say, timing your pulse for a [factor of 60] seconds (30 seconds, 20 seconds, 15 seconds, 12 seconds, etc.).
I think the answer would be no
