Step 1: Understand water hyacinth pollination.
Water hyacinth can be pollinated by both wind and insects, depending on environmental conditions.
Step 2: Review the options.
- Water hyacinth is commonly pollinated by insects.
- It can also be pollinated by wind, as it has light pollen that can be carried by air currents.
- Therefore, the correct answer is option (D) as it includes both insect and wind pollination.
Step 3: Conclude.
Water hyacinth can be pollinated by both wind and insects, making option (D) the correct answer.
Final Answer:
\[
\boxed{\text{Both (B) and (C)}}
\]