The correct answer is B.
Alonso de Leon, known for his nickname "El mozo" (1639–1691) was an explorer who led several expeditions in the current territories of Northeastern Mexico and Texas.
Alonso de Leon was informed that some French expeditioners had settled down and created a fort in the coastal area of Texas. The viceroy of the colony of New Spain, Gaspar de la Cerda y Mendoza, sent him there to expell the French settlers.