Read the draft passage. Paragraph 1: A committee reviewed early data from a pilot housing program. Several participants had not yet completed the final survey. Paragraph 2: The passage acknowledges the limitation and describes a restrained conclusion. [Sentence 1: The data were incomplete.] [Sentence 2: The committee reached a cautious preliminary recommendation.] The report calls for additional data before a permanent policy is adopted. Which revision best fits the passage by using a prepositional phrase that preserves a precise concession accurately and concisely?