Does the sentence "Inside the pump, a mechanism expands a small sealed cavity to create a vacuum." provide a valid answer to the question "Why is fluid in a manual pump pushed into the pumps cavity when a small sealed cavity is expanded?"

A: no

Does the sentence "Colors applied to this yarn are noted for being more brilliant than colors applied to softer yarn." provide a valid answer to the question "How is color perceived to be for lisle in comparison to softer yarns?"

A: yes

Does the sentence "The Latin word crux was also applied to objects other than a cross." provide a valid answer to the question "What causes the different accounts of the cross used?"

A: no

Does the sentence "A 2001 study conducted by the pro-life Population Research Institute (PRI) falsely claimed that the UNFPA shared an office with the Chinese family planning officials who were carrying out forced abortions." provide a valid answer to the question "What organization found no evidence that UNFPA had supported Chinese coercion?"

A:
no