$10.$ In an isomerization unit, $10,000$ barrels of normal butane are converted to isobutane with a yield of $85\%.$ Calculate the volume of isobutane produced in cubic meters. $(1$ barrel $=159$ liters$)$

a$)1,350$ cubic meters

b$)1,200$ cubic meters

c$)1,250$ cubic meters

d$)1,360$ cubic meters