1. The 4 faces of a regular tetrahedron are labeled with $1,2,3,4$. Four such uniform regular tetrahedrons are simultaneously thrown onto a table, and the product of the 4 numbers on the 4 faces that touch the table is divisible by 4. The probability of this happening is
A. $\frac{1}{8}$
B. $\frac{9}{64}$
C. $\frac{1}{16}$
D. $\frac{13}{16}$