Question

.................the metric system is used throughout the world, it is still not commonly used in the

United States.

O a. Despite
O b. In spite of
O c. Although
O d. Because​

Answer 1

c). Although

Step-by-step explanation:

Despite and in spite of are used with a noun-like structure after it - but we have a sentence-like one "system is used".

We're left with Because and Although, both fit grammatically, but I SURE HOPE the US don't reject the metric system just out of spite - so we should choose Although as the only logical answer.