Nhận biết (M1)

While researching a topic, a student has taken the following notes:

• • 1905: US astronomer Percival Lowell begins searching beyond Neptune for a mysterious planet he calls “Planet X.”

• • 1916: Lowell dies but leaves money to upgrade his observatory.

• • 1929: A new telescope is built at the observatory.

• • February 1930: Observatory assistant Clyde Tombaugh records the first photographic evidence of Planet X.

• • March 1930: Astronomers rename Planet X, calling it Pluto to honor Lowell (the first two letters are Lowell’s initials, PL).

The student wants to specify Percival Lowell’s contributions to the discovery of Pluto. Which choice most effectively uses relevant information from the notes to accomplish this goal?

• A.

  Astronomers renamed Planet X in 1930 to honor Lowell for his contributions to the discovery of Pluto.

• B.

  After a new telescope was built at Lowell’s observatory in 1929, Clyde Tombaugh recorded the first photographic evidence of Planet X, later renamed Pluto.

• C.

  In 1930, Lowell became the first person to record photographic evidence of Pluto, known at the time as Planet X.

• D.

  Lowell began the search for Pluto in 1905 and later left money to upgrade the observatory where it was discovered in 1930.