In the year 1999 in the country of Uganda, farmers noticed little red, rust-like bumps on the leaves of their wheat plants shortly before they began to die. Through scientific observations and experimentation, scientists discovered it was caused by a fungus and named it UG99 after its place of discovery and the year it was discovered. Determining it was caused by a fungus is a/an
a. theory
b. hypothesis
c. conclusion
d. observation
e. statistical analysis