His san francisco bandleader was not famous, but established the saxophone section as part of a jazz ensemble:

He was Art Hickman.

Explanation:

Arthur George Hickman was a drummer, pianist and bandleader. He wasn't really famous but he was known to include jazz with a saxophone section during his dance orchestra, which had never been done before.

He founded his sextet (group of 6 playing music together) in 1913 in San Francisco.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

the answer would be c. sediment buildup on continental slope

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