How many iambs are found in this line from "Sonnet 18"?

Sometime too hot the eye of heaven shines

A. four B. five C. eight D. ten

There are five iambs found in "Sonnet 18." Iambs or iambic feet is a metrical unit used in poetry which is made up of one unstressed syllable followed by one stressed syllable. Shakespeare's sonnets are basically written in iambic pentameter, one example is the Sonnet 18.