When We Compare Diagrams for Firms in Different Market Structures,what

When we compare diagrams for firms in different market structures,what do we notice

A) For competitive firms and monopolistically competitive firms, the revenue curves are similar but the cost curves are quite different.
B) For competitive firms and monopolistically competitive firms, the cost curves are similar but the revenue curves are quite different.
C) For monopoly firms and monopolistically competitive firms, the revenue curves are similar but the cost curves are quite different.
D) For monopoly firms and monopolistically competitive firms, the cost curves are similar but the revenue curves are quite different.