By 1838, all of the following Central American countries became sovereign republics except El Salvador. The correct option among all the options that are given in the question is option "b". The country of El Salvador got its independence in the year 1841. The other countries in the question had already got their independence by 1838.
This statement is WRONG.
The supply curve is an upward-sloping function that determines the relationship between price and quantity supplied. Therefore, if the quantity supplied changes, this would trigger <u>a movement along the curve (and not a shift!). </u>
- An increase in the quantity supplied corresponds to an increase in the selling price of the product. Producers are willing to supply larger quantities when the price is higher. This proves why the slope of the curve is positive.
- On the contrary, a decrease in the quantity supplied corresponds to a decrease in the price.
Thomas Edison invented the electric light bulb in 1879.
