What does fread(buffer, sizeof(uint32_t), 8, stream) return?

What does fread(buffer, sizeof(uint32_t), 8, stream) return?

1. The number of complete uint32_t elements read, from 0 through 8.
2. The number of bytes read, from 0 through 32.
3. EOF when the stream contains fewer than eight elements.
4. Exactly 8 unless the program has undefined behavior.