Various Ices Condense at Temperatures Less Than 300 K

Multiple Choice

Various ices condense at temperatures less than 300 K. What is the smallest distance from the Sun in the early solar nebula at which these ices would have condensed to form solid particles? (See Figure 8-10 of Universe, 11th ed.)
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A) 2 au
B) 5 au
C) 1 au
D) 1.5 au