Why was Malone sweating?

Choices:
A. The sun was rising.
B. He was fantasizing in his hotel bed.
C. He put a robe over his nightshirt despite the heat.
D. not enough information
He was fantasizing in his hotel bed.
Pirate gold. Coins, rings, ingots. Necklaces of emeralds and opals and sapphires. Chalices, bracelets, daggers inlaid with diamonds and lapis and ivory. Malone rolled over in the soft hotel bed. Not just gold but the things it would buy. A two-story house of brick and wrought iron. Greek columns in front and coaches parked in the drive. Built high on the center of Galveston Island, away from the deadly storms of the Gulf, away from the noise and stink of the port. White servants and negro slaves. Fair-haired women to sit at the piano in his parlor. Dark-skinned women to open their legs to him in the secrecy of the night... He sat up in a sweat. I will think no evil thoughts, he told himself. Outside, the sun rose over New Orleans. Horse-drawn carts creaked and rattled through the streets, and chickens complained about the light. The smell of the Mississippi, damp and sexual, floated through the open window. Malone got up and put a robe on over his nightshirt, despite the heat. He turned up the gas lamp over the desk, took out pen, ink and paper, and began to write. 'My dearest Becky...' * He smelled the French Market before he saw it, a mixture of decayed fruit, coffee, and leather. He crossed Decatur Street to avoid a side of beef hung over the sidewalk, swarming with flies. Voices shouted in a dozen different languages. All manner of decrepit wooden carts stood on the street, their contents passed from hand to hand until they disappeared under the yellow canvas awnings of the market. Beyond the levee Malone could see the tops of the masts of the tall ships that moved toward the Governor Nicholl's Street Wharf.