Question

summarizing: informational text — quiz — level h
this diagram compares a cross section of a normal brain with that of a brain affected by alzheimers disease.

however, other researchers in this field have questioned these findings. when conducting the same experiments, their results have been different. they have not found evidence to support the theory that speaking two languages improves ones mental abilities. does this mean that earlier findings were wrong? not necessarily, but many people agree that there isnt enough proof to draw any conclusions about the \brainy\ benefits of bilingualism at this time. additional research must be done to better understand how bilingualism and mental functions are connected.

what is the best summary for this part of the passage?
similar experiments have produced different results, so more are needed to link bilingualism and brain function.
researchers in the medical field must do more experiments to learn about the brains functions besides language.
debating the advantages of being bilingual wastes time, so researchers should try to work together more.
there is probably a link between bilingualism and mental function, and more experiments will prove this.

Explanation:

The passage states that some researchers got different results from studies on bilingualism and mental abilities, so there is not enough proof to confirm the link, and more experiments are needed. The first option matches this core idea, while others either focus on unrelated brain functions, make an unstated claim about wasted time, or incorrectly assume a likely link exists.

Answer:

Similar experiments have produced different results, so more are needed to link bilingualism and brain function.