Social networks and the reciprocal norms associated with these networks that encourage people to do things for each other are known as a. Social capital. C. Networking. B. State capitals. D. The digital divide. Please select the best answer from the choices provided A B C D.

The following function returns a string of length n whose characters are all 'x'. give the order of growth (as a function of n) of the running time. recall that concatenating two strings in java takes time proportional to the sum of their lengths. public static string f(int n) { if (n == 0) return ""; if (n == 1) return "x"; return f(n/2) + f(n - n/2); } options: a) constant b) logarithmic c) linear d) linearithmic e)quadratic f)cubic g) exponential

Which demographic challenge is europe currently experiencing? a. an aging and decreasing population b. a baby boomc. an unequal distribution between males and females d. a large group of teenagers moving through the school system(i chose a but i'm unsure)

Need ! will choose brainliest! discuss the role of abstraction in the history of computer software.