Step 1: Evaluate Statement I.
Cannabinoids are abused as recreational drugs and are also included among substances prohibited in sports.
Hence,
\[
\boxed{\text{Statement I is true}.}
\]
Step 2: Evaluate Statement II.
Cocaine interferes with the dopamine transporter and affects dopamine transport at synapses.
Hence,
\[
\boxed{\text{Statement II is true}.}
\]
Step 3: Choose the correct option.
Since both statements are true,
\[
\boxed{(A)}
\]
is the correct answer.