From the enthalpies of reaction: 2 C(s) + O2(g) → 2 CO(g) ΔH = -221.0 kJ
2 C(s) + O2(g) + 4 H2(g) → 2 CH3OH(g) ΔH = -402.4 kJ

Calculate the ΔH for the reaction:
CO(g) + 2 H2(g) → CH3OH(g)

Is there a diagram/picture you can provide? it seems this question goes along with a

Fine out your self ponk

Wagons/motorized vehicles

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.