Answer:
C. Loud, upbeat.
Theme tunes for news alerts on TV are typically loud and upbeat, in order to grab the viewer's attention and create a sense of urgency or importance. The use of strong, bold rhythms and prominent percussion instruments is also common. This type of music is intended to convey a sense of excitement and urgency, which is appropriate for breaking news or important announcements. Soft, legato melodies or pianissimo melodies are less common in news alert theme tunes, as they are not as effective at conveying a sense of urgency or importance.