In a rare coin collection, all coins are either pure gold or pure silver, and there is initially one gold coin for every three silver coins. With the addition of 16 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information, how many total coins are there now in this collection (after the acquisition)?	Choose the correct option:
A) 144	B) 150	C) 156	D) 162	E) 168
Initially the number of gold coins and silver coins is 2k and 6k.   After adding gold coins, the number of coins is 3k and 6k.   Thus k = 16 and the total number of coins is 9k = 144.   The answer is 144.
<result>A</result>
In a rare coin collection, all coins are either pure gold or pure silver, and there is initially one gold coin for every three silver coins. With the addition of 16 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information, how many total coins are there now in this collection (after the acquisition)?