Which of the following has been mentioned by historians as a cause of world war i?

a. nationalism in the balkans
b. militarism of african nations
c. fighting between india and pakistan
d. an unprovoked attack on the u. s.

Option A, nationalism in the Balkans

Explanation:

Eastern Europe cluster of nations lying between the Austro-Hungarian and Ottoman empires was known as Balkans. Due to its strategic location, all the Europeans powers focused on Balkans’ event. Also,  the Balkans were  politically active as they had both national ethnicity and tension with in its national territories.  

In 1912, several Balkan nations  became part of military alliances as influenced by the Russians which later on led to the  formation of the Balkan League. This Balkan league waged several wars against the Ottomans in order to remove them from eastern Europe. After fighting for eight months, Balkan won this battle but they were disrupted and thus Serbian nationalist groups and led to World War I

Hence, option A is correct

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

50% lit on the left side