Our solar system contains many elements heavier than iron. What is the likely origin of these elements? A.
the sun
B.
a supernova explosion
C.
a black hole
D.
a white dwarf

Why did many americans want the united states to cuba gain independence from spain? cuba was rich in natural resources, including gold and oil. cuba would provide access to the pacific ocean through a narrow strait. the united states had strong economic ties to cuba. the majority of cubans expressed interest in becom ing a us state.