问题如下：
5. In his original purchase of 2,000 shares of the Japanese equity product, Riser least likely violates the Standard relating to:
选项：
A.Suitability.
B.Priority of Transactions.
C.Integrity of Capital Markets.
解释：
A is correct.
Riser least likely violates Standard III(C) relating to suitability when purchasing shares for his own account. Riser may violate Standard II(A) —Material Nonpublic Information and possibly Standard VI(B) —Priority of Transactions when making the purchase. If, when trading for his own account, Riser knows that he will place a large block trade for Komm clients, he may be in possession of material nonpublic information. Standard VI(B) covers the activities of all members who have knowledge of pending transactions that may be made on behalf of their clients or employers. Riser has accepted the position of managing partner, has recommended the manager for the product, and knows, or should know, that he will purchase the product for at least some Komm clients once he begins work at Komm. His purchase ahead of Komm’s clients might be front-running. Best practice would be to delay his private account purchase until after he purchases shares for clients.
没看懂答案得出的依据，可以详细解释下么
