(Reuters) - Warren Buffett's Berkshire Hathaway Inc on Friday said it boosted its stake in cable TV operator Charter Communications Corp, and signaled it may have another large investment planned after agreeing to buy Precision Castparts Corp in its largest-ever purchase.
Take context from the input text and decide on the accurate relationship between 'Berkshire Hathaway' and 'Charter Communications' from the options provided.
Options: business division, developer, subsidiary, owner of