Question

a scientific theory can come from
several investigations from one scientist
one investigation that has lasted over several years
the investigations of several scientists from around the world
one investigation that is conducted by several people in a lab

Explanation:

A scientific theory is a well - substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. It is not just one investigation (whether by one scientist, several people in a lab, or one long - lasting investigation). Instead, it comes from the investigations of several scientists from around the world. This is because scientific knowledge is cumulative and collaborative. Different scientists may approach the same problem from different angles, use different methods, and contribute different data. Through peer - review and replication of experiments, a consensus is built, and a theory emerges.

Answer:

the investigations of several scientists from around the world