Malte Andersson's Study of Widowbirds Demonstrated That

Multiple Choice

Malte Andersson's study of widowbirds demonstrated that

A) females prefer males with unaltered tails.
B) the preferences of females change according to the season.
C) sexually selected traits have no benefits or costs to survivorship.
D) long tails help males compete physically with other males.
E) females prefer males with longer-than-average tails.