Which of the following best describes a significant historical or geopolitical relationship between Sri Lanka and India?
a. Sri Lanka and India have a long history of military conflicts over territorial disputes.
b. India was a significant influence in the Sri Lankan civil war, providing support to one of the factions.
c. Sri Lanka and India share a common colonial history under British rule, but Sri Lanka was governed separately.
d. India and Sri Lanka have had ongoing economic conflicts related to maritime border disputes.