The Socialist Party of America most likely support Operation of factories by the government.
D. Operation of factories by the government
Step-by-step explanation:
The Socialist Party supported the Socialist policies within the Democratic framework. They had some values on many issues like economics, imperialism, labour, Racism, LGBTQ rights, disabled, senior citizens etc.
The operation of factories by the government was also supported by the Socialist Party. As they want the government to take part in policies within the Democratic party. Keeping in mind the rights of all citizens.