Lucy is a girl of great musical _________, and I’m sure she will become a well-known musician sooner or later.

A．ability

B．sense

C．value

D．potential

为获得较客观有效的田野资料，调查者应采取何种视角立场（）

A.主位视角

B.客位视角

C.主位与客位视角互补

D.自由视角