A. 4
Explanation:
-There were 4 asteroids discovered between the years 1800 and 1840 namely:
1 Ceres- Discovered in 1801
2 Pallas -Discovered in 1802
3 Juno -Discovered in 1804
4 Vesta -Discovered in 1807
practical process described pest part of scientific investigation.
because practical knowledge is powerful then therotical knowledge.
just did the assignment and the answer was #1 +2 n