Concept:
Edmund Husserl is the founder of phenomenology.
A central idea in phenomenology is intentionality.
Intentionality means consciousness is always directed toward an object.
Step 1: Check Assertion (A).
The assertion says that consciousness is always consciousness of something.
This is correct according to Husserl.
For example:
\[
\text{thinking is thinking of something}
\]
\[
\text{perceiving is perceiving something}
\]
\[
\text{remembering is remembering something}
\]
Step 2: Check Reason (R).
The reason says consciousness is intentional and intentionality is object-directed.
This is also correct.
Step 3: Check explanation.
Because consciousness is intentional, it is always directed toward an object.
Therefore, Reason correctly explains Assertion.
Hence:
\[
\boxed{\text{(A)}}
\]