Identify two common vaccines recommended for adults.

The correct answer is B, which identifies influenza and Tdap as two common vaccines recommended for adults.

Influenza vaccines are recommended annually for all adults, as they help protect against seasonal flu and its complications, especially for those with chronic health conditions, the elderly, or individuals with weakened immune systems. The Tdap vaccine, which provides protection against tetanus, diphtheria, and pertussis, is also recommended for adults, particularly for those who have not received it in the past ten years or for pregnant individuals during each pregnancy to protect newborns.

Other options present vaccines that have different target populations or recommendations. HPV and MMR are primarily recommended for adolescents and younger adults. Varicella and Polio vaccines are more critical during childhood, although some adults may need them based on specific circumstances. Hepatitis B is also more common in certain high-risk adult populations, and Yellow Fever is typically recommended for travelers to certain countries. However, influenza and Tdap are widespread recommendations for the general adult population, making them the most applicable choices here.