Which statement about the electron-cloud model is true?

A. It is the currently accepted atomic model.

B. it can easily be replaced by existing models

C. It specifies the location and momentum of an electron.

D. It does not explain the formation of emission lines

The question asked which among the given choices is true about the electron-cloud model. From the given choices, it is said that the electron-cloud model specifies the location and momentum of an electron. Thus, the answer for this item is most likely to be C. All the other choices are not necessarily true about the given model.