Choice A rationale:

Encouraging using sterile instruments for cutting umbilical cords is important in preventing tetanus as contaminated instruments can introduce the

C. tetani spores, leading to infection.

Choice B rationale:

Promoting safe delivery practices in clean facilities is crucial to prevent tetanus in newborns. Clean delivery facilities reduce the risk of exposure to

C. tetani spores, which can enter through unclean delivery practices.

Choice C rationale:

Advising against disposing of animal feces properly is not directly related to preventing tetanus. Tetanus is primarily caused by the introduction of

C. tetani spores into wounds, not through exposure to animal feces.

Choice D rationale:

Educating on avoiding contact with soil or feces that may contain

C. tetani spores is essential in preventing tetanus. The spores can be found in soil and feces, and direct contact with these sources increases the risk of infection.

Choice E rationale:

Suggesting regular booster doses of DTP vaccine during adulthood is an effective measure in preventing tetanus. The DTP vaccine provides immunity against tetanus, and regular boosters are recommended to maintain protection throughout life.