why does clearing forests using fire contribute to the greenhouse effect?

a burning trees returns stored methane to the atmosphere as a gas
b burning trees returns stored oxygen to the atmosphere as a gas
c burning trees returns stored carbon to the atmosphere as carbon dioxide
d burning trees returns nitrogen to the atmosphere as nitrous oxide

c burning trees returns stored carbon to the atmosphere as carbon dioxide

When forests are cleared using fire, the carbon stored in the trees is released into the atmosphere as carbon dioxide, a greenhouse gas. This contributes to the greenhouse effect, which traps heat in the Earth's atmosphere and leads to global warming.