请教一道语法题

21          In her later poems, P W’s blending of solar imagery, J C thought and figures, and the images she borrowed from ancient classicism suggesting her range and depth of influences, not the least of which is her African heritage.

C  images borrowed from ancient classicism suggests

我不明白为啥suggests 用单数，因为我认为他的主语应该是：“P W’s blending of solar imagery, J C thought and figures, and the images she borrowed from ancient classicism ”，应该加复数才对，请教大侠！谢谢

个人认为，主语是blending，用单数。