Question

Which is the BEST summary of the passage?

Lowell's study of Mars eventually led to the discovery
of Pluto, which was later downgraded to a dwarf
planet.
After Lowell discovered Pluto, the discovery of Eris
led to questions about Pluto's status as a planet.
The Lowell Observatory was a leader in astronomical
discovery
Lowell's dedication to planetary study inspired
Americans' interest in space.

Answer 1

After Lowell discovered Pluto, the discovery of Eris

led to questions about Pluto's status as a planet.

Step-by-step explanation:

I know because I took the test before

Answer 2

After Lowell discovered Pluto, the discovery of Eris

led to questions about Pluto's status as a planet.