In a move to support oil prices, Saudi Arabia said Thursday that it would extend its decision to cut oil production by one million barrels a day for another month, to September. Oil prices have recovered strongly in recent weeks partly because of smaller stockpiles of fuel in the United States, but China’s tepid economic recovery has kept oil prices under pressure for most of the year. But the Biden administration has been pressing Saudi Arabia to keep production high because oil prices are set on the global market and are the major factor in determining U