Question

multiple - choice question
before crude oil is discovered underground, ____________ is used to create light.
whale oil
cotton
electricity
rewatch

Explanation:

Before the widespread use of crude - oil derived fuels, whale oil was commonly used in lamps to produce light. Cotton is a fabric - making material and not a primary light - creating source. Electricity for widespread lighting came later in history compared to the use of whale oil.

Answer:

A. whale oil