In each of the following questions, three sentences are given with an bold phrase or words. Choose the single phrasal verb from the options that can grammatically and contextually replace all of the bold phrases or words across all three sentences without changing their core logical meaning. If the sentences are correct as they stand, choose "No improvement required". 1.      The environmental task force was surprised to learn that the chemical plant continued to emit toxic sulphur dioxide fumes into the atmosphere. 2.      ​The primary objective of the corporate retreat was to distribute copies of the updated compliance and ethics handbook to all department heads. 3.      ​Despite her calm and collected external appearance, her erratic body language continued to betray signs of extreme nervous exhaustion.