It's arms race! so, B.)
The main causes are
Allied forces won ww1
Answer:
and i oop
Explanation:
The leading European powers that faced an increase tension because of nationalism during the early 1900s are the following;
<span>- </span>The ottoman empire
<span>- </span>France
<span>- </span>Great Britain
They are the leading European powers that experienced tension because of nationalism.