Final answer:
Martha behaved like most fourteen-year-olds would do, exhibiting common characteristics and behaviors of teenagers at this age.
Step-by-step explanation:
Yes, it can be agreed that Martha behaved like most fourteen-year-olds would do. Teenagers at this age often exhibit certain characteristics and behaviors that are common to their age group. This includes being cheerful, witty, and having social popularity, as mentioned in the given text. It is important to note that individual behaviors may vary, but Martha's behavior aligns with typical behavior for her age group.