Answer:
D) they wanted to build a US-owned canal through Panama.
The United States supported a rebellion in Panama in 1903 because they wanted to build a US-owned canal through Panama. At the time, Panama was part of Colombia, and negotiations between the United States and Colombia over the construction of a canal through Panama had broken down. The United States saw the rebellion as an opportunity to support the creation of an independent Panama that would be more open to negotiating a canal treaty on favorable terms to the US. Once the rebellion succeeded and Panama became independent, the United States quickly negotiated a treaty with Panama to build a canal across its territory.