An ideal gas of N molecules is maintained at a constant pressure p. The graph shows how the volume V of the gas varies with absolute temperature T.

What is the gradient of the graph?

A. \(\frac{N}{p}\)

B. \(\frac{NR}{p}\)

C. \(\frac{{N{k_{\rm{B}}}}}{p}\)

D. \(\frac{N}{{Rp}}\)

C