<span>D. the search for new sources of raw materials and new markets</span>
<span>The City of Houston was founded in August 1836 by the brothers Augustus and John Allen. The following year, in 1837, Houston was incorporated into the Republic of Texas and remained its capital until 1840. Houston's economy at that time was based largely on agriculture; however, when oil was discovered at Spindletop in 1901, it became the most significant economic pillar</span>
if you were speaking of a country it would be Roman Empire :)