1. Which statement best expresses the central idea of the text? After studying the abilities of mind controlling parasites, scientists suspect that parasites might be able to similarly affect humans.

While it has been confirmed that some parasites can control the actions of their hosts, how they can do so largely remains a mystery to scientists.

Parasites can control the actions of their hosts by altering the chemistry of their brains, forcing them to help the parasites and their young survive.

The ability for parasites to understand the minds of other organisms has disproved the notion that single-celled organisms are unintelligent.