Annexation of texas and boundary disputes
The Intolerable Acts were the set of laws that closed Boston Harbor and prevented the local Massachusetts government from meeting because the British Parliament made the government of Massachusetts under their control.
D is correct one ok ok ok
The development of irrigation systems made farming easier, as water was more easily accessible to crops. This meant that food could be produced more efficiently. More efficient farming techniques meant that food was more plentiful, where people weren't constantly scrambling for their next meal or going days without eating. It also gave people the ability to specialize in certain trades, creating better quality of goods and advancing technology in civilizations.
