Given that the file is a valid shell script, how can this script be executed?

The current directory contains the following file:

-rwxr-xr-x 1 root root 859688 Feb 7 08:15 test.sh

Given that the file is a valid shell script, how can this script be executed? (Choose two.)
A . run test.sh
B . ${test.sh}
C . cmd ./test.sh
D . ./test.sh
E . bash test.sh

Answer: DE