This is a bit subjective, because there are a few ways this sentence could be re-written, however "<span>Tom opened the box and looked into it, only to find it empty" is the most standard. </span>
<span>The biggest American ally was France, who provided arms, financing, naval support.
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The correct answer is D. So yeah, if that <em>was</em> a question. than D. is correct
It's a tricky question at least for me, because both national government and state governments do share (some) powers but not all because a state is its own state with it's laws and regulations. Though, the majority of what the national government and the state government shares together are important but also basic. So, I'd say yes.