I believe it is A, That seems like the most reasonable
<span>Because Wilson found it increasingly difficult to maintain U.S. neutrality after Germany, despite its promises in the Arabic pledge and the Sussex pledge, initiated a program of unrestricted submarine warfare early in 1917 that threatened U.S. commercial shipping.
hope this helped :)
alisa202</span>
Answer:
A. <u>I have known them since a long time</u>.
