(Each) employee with (a modicum of intelligence) (would be able to) undertake (such) a basic process.

A．hidden
B．profound
C．mutual
D．racial

A．irrefutable considering the authoritative nature of Emmel’s observations
B．likely in view of present evidence
C．contradictory to conventional thinking on lobster-claw differentiation
D．purely speculative because it is based on scattered research and experimentation