Assumption I: Artificial honey can be prepared.
This is implicit, as the advertisement suggests a distinction between pure/natural honey and artificial honey.
Assumption II: People do not mind paying more for pure and natural honey.
This can be considered implicit because the advertisement encourages the purchase of pure and natural honey, implying that consumers value it and may be willing to pay more for it.
Assumption III: No other company supplies pure honey.
This can also be considered implicit, as the advertisement's phrasing may suggest that company X is promoting its honey in a way that implies exclusivity, even if it's not explicitly stated.
So, the correct option is (D): All are implicit.