A．conducted their research at approximately the same time
B．sought to manipulate the sex ratios of some of the animals they studied
C．sought an explanation of why certain sex ratios exist and remain stable
D．studied game theory, thereby providing important groundwork for the later development of strategy theory

A．Poetry and Satire as Influences on the Novels of Virginia Woolf.
B．Virginia Woolf: Critic and Commentator on the Twentieth-Century Novel.
C．Trends in Contemporary Reform Movements as a Key to Understanding Virginia Wootf’s Novels.
D．Virginia Woolf’s Novels: Critical Reflections on tile Individual and on Society.