Read the following context and choose the correct option to answer the question. Context: WHITE HOUSE/BROWNSVILLE, TEXAS A day after U.S. President Donald Trump reversed a policy of separating migrant families at the U.S.-Mexico border, Department of Homeland Security Secretary Kirstjen Nielsen said there is a plan to reunite the more than 2,000 children who have been detained apart from their parents. "We have a plan to do that," the secretary told reporters at an event in Washington Thursday morning. Shortly before she spoke, a VOA reporter at an immigration court hearing in Brownsville, Texas, said prosecutors dropped misdemeanor charges against 17 migrants. The migrants, who were separated from their children remain detained, but dropping the charges could be a means to reunite them and allow the families to be detained as units. David Bier, an Immigration Policy Analyst at the libertarian Cato Institute, said if government prosecutors are dropping criminal charges in similar cases across the immigration court system, it calls into question the Trump Administration's 'Zero Tolerance' policy towards immigration. It's "an even more clear signal that the whole purpose of bringing these prosecutions is to separate parents from children and not about enforcing the law." he told VOA. The administration's policy requires that anyone who crosses the border illegally face criminal charges. "If it continues to be the case that some of these cases or many of them are dismissed by courts that should be the end of the policy," Bier added. The moves come as the House of Representatives prepares to vote Thursday on a pair of immigration bills that address the separations, as well as other issues that have divided the country's major political parties. Nielsen repeated her calls for lawmakers to act. "I want to be very clear on this. Congress has the authority and responsibility to make the law of the land and to fix the immigration system," the secretary said. "We have done everything we can do in the executive branch." The outcome of the votes is uncertain. One measure is more hard-line, while the other... Question: When will parents be reunited with their parents at the border? Options: A. after the immigration policy by Trump is reversed B. before the immigration policy by Trump was reversed C. before immigration laws were passed D. not enough information
A:
A