EXAMPLE : The skill and the precision of the Anasazi ...

The skill and the precision of the Anasazi, ancient inhabitants of the Southwest, in measuring the movements of the Sun and Moon is evidenced not only at Chaco Canyon but at a number of other sites.

(B) in measuring the movements of the Sun and Moon are evidenced not only at
(E) to measure the movements of the Sun and Moon are evidenced not only at

The "to measure" is some how meaning ... now. The gerunds are generally preferred to express a well established facts [ B ]

Explanation