Answer:
C. Cryptogams.
Step-by-step explanation:
Cryptogams are a group of plants that reproduce by spores. They do not have flowers or seeds, and their reproductive organs are not visible to the eye directly.
Cryptogams include mosses, ferns, algae, and fungi

- Bryophytes are a group of non-vascular plants that include mosses and liverworts. They reproduce by spores, but they do not have a dominant sporophyte generation.
- Sporophytes are the spore-producing generation of plants. They are the dominant generation in vascular plants, such as ferns and gymnosperms.
- Thallophytes are a group of simple, non-vascular plants that do not have a distinct differentiation into roots, stems, and leaves. They reproduce by spores, but they do not have a dominant sporophyte generation.
Therefore, the correct answer is C. Cryptogams.