Moderate# Identifying Nets

TOPO-X4G5ID

Let $X$ be a topological space, which is also an algebra (addition and multiplication of elements in $X$ are defined, as well as multiplication by scalars). Let $A$ and $B$ be directed sets.

If $a:A\to X$, $b:A\to X$ and $c:B\to X$ are nets in $X$, which of the following are also nets in $X$? Select **ALL** that apply.