Which word does the underlined clause modify? the underlined clause is 'which meet strict requirements'.
only a few plants, which meet strict requirements, will go under an electron microscope.
a.
go
b.
plants
c.
few
d.
only

Travelers on Highway 66 today can easily experience this past through the many motels, gas stations, cafés, trading posts, and roadbeds that remain along the highway.

It was sold as "the shortest, best, and most scenic route from Chicago through St. Louis to Los Angeles."

Business owners in small and large towns along the highway looked to Route 66 as an opportunity for attracting new customers to their often rural and isolated communities.

Explanation:

The 3 sentences give factual information while the other 2 sentences that you can select talk about how it is popular or how it is an endangered site, not about factual information on Route 66