\textbf{100-} \textbf{The passage provides enough information to answer which of the following questions?}\\
\hspace*{1em} 1) Why is the atmosphere of Mars thin?\\
\hspace*{1em} 2) Where has the iron oxide on Mars come from?\\
\hspace*{1em} 3) Why are the two moons of Mars irregularly shaped?\\
\hspace*{1em} 4) How many planets are closer to the Sun than Mars is?