You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Some research has shown that the burning of fossil fuels contributes to an effect called global warming, which scientists believe is changing the chemical makeup of Earth's atmosphere. Use of which invention would help lower this effect?
(A) electric car (B) digital camera (C) high-speed Internet (D) battery-powered radio
A