Twenty of the birds are about to take to the skies with the task of measuring air pollution, each (36) _____________ with sensor equipment and a mobile phone.

Pressure response A

…each ____________ with sensor equipment and a mobile phone: each ____________ with a touch device and a mobile phone. Use participle clauses to connect two sentences with different subjects. In this case, all 4 options are participle 2, so just consider the meaning.

Answer A is correct.

A. armed: to be armed with sth

B. loaded: to be loaded with sth

C. granted: granted, granted

D. stocked: stocked, stocked