MENLO PARK, Calif., Aug. 24—In business, it’s not what you know or even who you know, but who knows you that matters, suggests a new Robert Half Management Resources survey. Almost one in three (28 percent) chief financial officers (CFOs) interviewed said staying connected through professional groups is the best way for accounting and finance managers to enhance their professional visibility. Active participation on social media sites such as LinkedIn and Twitter came in a close second, with 22 percent of the response....