I would say 1. The light bulb because candles were far more of a fire hazard and a lot less light 2. Electric heater because again a lot less of a fire hazard and less prep work 3.electric refrigerator because you could safely store food for a long time with out spoil and or deep freezer for the same reason. Edit: some of this you might want to reword.
Explanation:
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Is the power to declare war
Rain forests are most likely to be found closest to the equator
The correct answer is D) news that a company is about to release a promising product.
<em>The reason that might convince an investor to buy stock or mutual funds is "news that a company is about to release a promising product."</em>
Smart investors are cautious when its time to invest their money but at the same time they are not afraid to invest in a risky scenario when the product seems good and the interest paid is attractive. Smart investors like to diversify its portfolio in order to gain more money from different sources and securing their positions. None of them are going to bet all their money in just one product. So the reason that might convince an investor to buy stock or mutual funds is "news that a company is about to release a promising product."