You are apt to find ferns in a moist location because they have :

Options

A. a water-dependent sporophytic generation
B. flagellated spores
C. swimming sperm
D. all of the above

Explanation

To answer the question, "You are apt to find ferns in a moist location because they have:", we can break down the reasoning step by step.

### Step-by-Step Solution:

1. **Understanding Ferns**: Ferns are vascular plants that reproduce via spores and have a distinct life cycle that includes both a sporophyte and a gametophyte generation.

2. **Sporophyte and Gametophyte**: In ferns, the sporophyte is the dominant generation, which is the leafy plant we commonly recognize. The gametophyte is a smaller, often heart-shaped structure that produces gametes.

3. **Water Dependency**: Ferns require water for reproduction. The male gametophyte (antheridium) produces sperm that are flagellated, meaning they have tails that allow them to swim.

4. **Swimming Sperm**: The sperm must swim through a thin film of water to reach the female gametophyte (archegonium) to fertilize the egg. This swimming capability is crucial for the fertilization process.

5. **Moist Locations**: Because of the need for water for sperm to swim and fertilize the egg, ferns are typically found in moist environments where water is readily available.

6. **Conclusion**: Therefore, the reason you are apt to find ferns in moist locations is primarily due to their swimming sperm, which require water to facilitate reproduction.

### Final Answer:
You are apt to find ferns in a moist location because they have swimming sperm.

---