In November 2003, the Four Companies with the Largest Number $\chi$

In November 2003, the four companies with the largest number of home Internet users in the US were Microsoft, Time Warner, Yahoo, and Google, with a combined audience of 274 million users. Taking $\chi$ to be the Microsoft audience in millions, $y$ the Time Warner audience in millions, $Z$ the Yahoo audience in millions, and $u$ the Google audience in millions, it was observed that
$\begin{array} { l } z - u = 3 ( x - y ) + 6 \\x + y = 56 + z + u \\x - y + z - u = 50\end{array}$

How large was the audience of each of the four companies in November, 2003 (All amounts in millions.)

A) Microsoft: 88
Time Warner: 77
Yahoo: 73
Google: 35

B) Microsoft: 88
Time Warner: 77
Yahoo: 74
Google: 34

C) Microsoft: 88
Time Warner: 77
Yahoo: 74
Google: 35

D) Microsoft: 88
Time Warner: 78
Yahoo: 74
Google: 35

E) Microsoft: 89
Time Warner: 77
Yahoo: 74
Google: 35