Angela, a salesperson at QuantaSource, informs her coworkers that one of their accounts requires a high level of selling effort since it is possible to strengthen their competitive position. However, Juan, another salesperson, argues that the account requires a moderate level of selling effort that is sufficient to maintain their current competitive position. On the basis of portfolio analysis, which of the following, if true, strengthens Angela's argument?

a$.$ The account is minimally attractive and offers low opportunity.

b$.$ The account opportunity is high, but competitive position is weak.

c$.$ The account opportunity is low, but competitive position is strong.

d$.$ The account is very attractive and offers high opportunity.

e$.$ The account opportunity is high, and competitive position is strong.