Question

In the years leading to World War I, the spirit of nationalism increased competition among nations to do which of the following? Check all that apply.
 build large military forces
convert nonbelievers to Christianity
expand their colonial empires
form military alliances
expand their economies
hold big antiwar demonstrations

Answer 1

its 1 , 3, 4 ,5 .....

Answer 2

Build large military forces, expand their colonial empires, form military alliances and expand their economies.  These are the factors that led to the outbreak of World War I.  Tensions mounted as these developments happened.  The other two are not included as causes of the First World War.