In species where there is an unbiased operational sex ratio, you would most likely see

A) both males and females cooperating in the care of young.
B) strong sexual selection.
C) more females ready to breed compared to males.
D) females fulfilling the majority of parental care.

Operational Sex Ratio

The ratio of sexually competing males that are ready to mate to fecund females at any given time in a population.

Sexual Selection

A mode of natural selection where certain traits increase an individual's chances of reproducing by attracting mates or prevailing over rivals.

Parental Care

The behaviors and actions of parents directed toward supporting the survival, growth, and development of their offspring.