Answer:
Could be either.
Explanation:
Maybe there <u>were</u> a million people at the mall today!
Maybe there were not a million people at the mall today but there were a lot!
Sorry if that wasn't helpful. I was just stating facts!
Increasing demand for flat-screen TVs, according to estimates, could have a greater impact on global warming than the world's largest coal-fired power plants. Flat screen manufacturers use a greenhouse gas known as nitrogen trifluroide, and as these displays are becoming more and more popular, annual gas production has grown to about four thousand tons. Nitrogen trifluroid is the most dangerous global warming engine, for comparison, this gas is 17,000 times stronger than carbon dioxide.
A.
Complex sentences have a lot of words and go into further detail than a basic sentence.