Which American hop varieties are noted for their Noble characteristics?

The option that identifies Mt. Hood and Crystal as American hop varieties noted for their Noble characteristics is correct due to the specific aromatic qualities that these hops exhibit.

Noble hops are traditionally known for their subtle and complex aroma profiles, often described as spicy, earthy, floral, or herbal. Mount Hood and Crystal are American varieties derived from traditional European Noble hops, specifically bred to retain those desirable characteristics while adapting to the American growing environment.

Mount Hood is recognized for its excellent balance of spicy and floral notes, often imparting a mild, smooth bitterness that enhances the overall flavor profile without overpowering it. Similarly, Crystal hops provide a mild, pleasant aroma with floral and herbal notes, closely resembling the characteristics found in classic German Noble varieties.

Other options do not align with the question regarding Noble characteristics. Target and Challenger are English hops known for their higher bitterness and less aromatic subtlety compared to Noble types. Huell Melon and Mandarina Bavaria, while excellent hops, are more known for their fruity and melon-like flavors rather than Noble qualities. The last option, which describes general characteristics like citrus and fruity, does not specify hop varieties and therefore is not relevant to the question about Noble characteristics.