David Thodey engineered a stunning turnaround at Telstra , extending its dominant position in the mobile sector, negotiating lucrative agreements with the government (twice) over the National Broadband Network, selling off non-core assets and cutting expenses.
Take context from the input text and decide on the accurate relationship between 'Telstra' and 'David Thodey' from the options provided.
Options: brand, chief executive officer, distributed by, operator