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What must be true about the substance depicted in the following phase diagram?
Phase Diagram (MCAT: Phase Diagrams." Varsity Tutors. Varsity Tutors, LLC., n.d. Web. 1 July 2016.)
It sublimates under atmospheric pressure as temperature increases.
It cannot be liquefied.
It exists in more than one solid form.
Its liquid phase is denser than its solid phase.